Static vs. Dynamic binding in Java

Question

Can someone tell me what is the difference between static and dynamic binding in Java

Answer 1

1. Static binding occurs during compile time whereas, dynamic binding occurs during runtime

2. Private, final, and static methods use static binding while virtual methods use dynamic binding.

3. The static binding uses class information for binding while dynamic binding uses objects for binding

4. Overridden methods use dynamic binding at runtime while overloaded methods use static methods at compile time.

 These examples might give you an idea about static and dynamic binding.

public class StaticBindingExample

{

 public static void main(String args[]) 

{

 Collection collection = new HashSet(); 

StaticBindingExample sbe = new StaticBindingExample();

 sbe.sort(collection);

 }

 public Collection sort(Collection c)

 {

 System.out.println("Inside Collection sort method");

 return c; 

}

 public Collection sort(HashSet hs)

 {

 System.out.println("Inside HashSet sort method");

 return hs;

 }

 }

Output: Inside Collection sort method

class Animal{

    void sound(){

        System.out.println("Inside Animal class");

    }

}

class Cat extends Animal{

    @Override

    void sound(){

        System.out.println("Inside cat class");

    }

}

public class DynamicBindExample

{

public static void main(String[] args) {

Animal animal=new Cat();

animal.sound();

}

}

 

Output: Inside cat class

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